Issue 15, 2017

Controllable synthesis of supported platinum catalysts: acidic support effect and soot oxidation catalysis

Abstract

Platinum nanoparticles were synthesized by a classic polyol process in ethylene glycol. The Pt nanoparticles were loaded on H-ZSM5 and γ-Al2O3 supports by wet impregnation. The as-obtained solid was thermally treated in a two-step procedure to remove the organic residues. Due to their larger particle size than the micropore size of H-ZSM5, the impregnated Pt particles were dispersed on the external surface of the zeolite support. With similar Pt particle size distribution and Pt loading, the Pt/H-ZSM5 and Pt/γ-Al2O3 catalysts were evaluated for the oxidation of NO and soot. Despite its lower activity for NO oxidation to NO2, the Pt/H-ZSM5 exhibited a much higher activity for soot oxidation in the presence of NO + O2. This abnormal NOx-assisted soot oxidation behaviour of Pt/H-ZSM5 was explained by the promoting effect of the acid sites on the zeolite.

Graphical abstract: Controllable synthesis of supported platinum catalysts: acidic support effect and soot oxidation catalysis

Supplementary files

Article information

Article type
Paper
Submitted
31 May 2017
Accepted
16 Jun 2017
First published
16 Jun 2017

Catal. Sci. Technol., 2017,7, 3268-3274

Controllable synthesis of supported platinum catalysts: acidic support effect and soot oxidation catalysis

Y. Gao, W. Yang, X. Wu, S. Liu, D. Weng and R. Ran, Catal. Sci. Technol., 2017, 7, 3268 DOI: 10.1039/C7CY01087G

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